OpenAI buys Promptfoo to let companies hack-test their own AI agents

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OpenAI buys Promptfoo to let companies hack-test their own AI agents

Techfundingnews • March 10, 2026

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OpenAI acquires Promptfoo, the AI red-teaming tool used by 25% of Fortune 500 companies, to secure AI agents in its Frontier enterprise platform.

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OpenAI Acquires Promptfoo to Enhance AI Security OpenAI announced the acquisition of cybersecurity startup Promptfoo on March 9, 2026, to bolster the security of its AI agents. Promptfoo, founded in 2024, specializes in tools designed to protect large language models from online threats. The integration of Promptfoo's technology into OpenAI's Frontier platform aims to address the growing challenges of securing AI systems as they become more interconnected with real-world data. 12 sources 19

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